That’s odd. That doesn’t happen for me. (Firefox, MacOS) Can you say more?
Pasting from what kind of article? I assume an html site? What browser?
What OS? Are you pasting, or pasting-without-format? (eg. ctrl-shift-V instead of ctrl-V.)
In Settings → Editor → “Auto Convert HTML” what do you have set?
Do you potentially have any community plugins installed that are automatically handling that?
